We ran the Hypertech on our '02 before learning of other options...It ran smooth, shifted good and picked up a little MPG...If that's what you're looking for and the programmer is guarenteed to be "VIN unlocked", go for it...It you want something more, EFI Live is the answer for numerous reasons..
hypertech is not the best its ok tho i have one on a powerstroke..id go with the ppe if i were you. i been trying to sell mine. i have the 225hp one perfect for towing and fuel econ 2-3mpg, and at same time the power can be there.$300 shipped paid $550 .let me kno
yes the programmer works with all model duramaxs and it will work with your lly.